Incandescent electric lamp.



No. 707,099. Patented Aug. |9, I902.

E 8. GARDNER.

- 9 INCANDESCENT ELECTRIC LAMP]:

(Application filed July 22, 1901.)

(No Model.)

m: u'onms PETERS coI. mom-uma. wnsumorou. a. c,

EDGAR s. cARDNE oF BOSTON, MASSACHUSETTS, ASSIGNOR TOYBERNA STEIN ELECTRIC MANUFACTURING A CORPORATION OF MAINE.

IINCAINDESCEVNTELECTRIC LAMP.

' UNITED" STATES P TEN ooMPA Y, F PORTLAND, MAINE,

SPECIFICATION forming part of Letters Patent No. 707,099, dated August 19, 1902.

V Application filed July 22, 1901 Berial No. 69,183. (No model.)

Tc all whom, it may concern:

Be it known that I, EDGAR S. GARDNER, of Boston, (Dorchester,) in the county of Sufiolk and State of Massachusetts, have invented certainnew and useful Improvements in In- .candescent Electric Lamps, of which the following is a specification.

My invention relates to new and usef.ulim-' provements in incandescent electric lamps made up of a glass bulb witha glass tube sealed at its outer end to the neck of the bulb and at the inner end about the leading-in wires, to which is connected the usual fila-- ment, opposite which islocated the reflector '15 supported lengthwise on the inside of the bulb and practically parallel to the filament.-

My invention consistsof certain novel features hereinafter described and particularly pointed out'in the claims. 7 v

I In the accompanying drawings, which illustrate a construction embodying my invention, Figure 1 is a side view of an incandescent electric lamp, showing in full lines the shape of the lamp and in dotted lines the position 2 5 of the parts within the lamp. Fig. 2 is .a detail view of the glass tube, leading-in wires,

and filament. Fig. 3 is aplan view of the refleotor. Fig. 4 is'a' sideview of the reflector. Like letters of reference refer to like-parts 3 throughout the several views.

When making this lamp, I cut off the neck of the bulbrA and insert the reflector E, which is so tempered that itispliable and retains its elasticity and rollit up and. insert it through the neck of the bulb. It then takes its origi nal shape and is attached to the side of I the bulb by means of the wire F, which is sealed into the glass blilb. This wire Fv may be of platinum or with a platinum end where it is 40 sealed into the glass. I have found platinum best for use where it is sealed to the glass, al though I have used other metals. I place a drop of glass on the end of the wire F to insure ready connection with the inside of the bulb. After this the glass stem B and filament D, with the leading-in wires 0, are inserted through the neck and the upper end of the glass tube sealed; to the neck in the I 'usual manner. The reflector E, preferably of aluminium in the form of a disk, is pol- I ished on the side next to the filament and is attached to the inside of the bulb, as above described, and lengthwise to it and practically parallel to the filament, which gives the best results when used in a helical form. Af 5 5 direction in which the light is to bethrownt In cases where the filaments are spread so ,as to be wider than the neck of the bulb I press the coils together and proceed. as pre* viouslydescribed. ThenI remove the tube at the end opposite the neck and by means of a special tool return the filament to its original position, after which I retube the lamp and it is exhausted and'the tip closed in the usual manner. The reflector may-be located in any desired position in relation to'the bulb and the 'fila-U I ment. I V I do not limit myself to the arrangement and construction shown, as the samemay be varied without departing from the spirit of myinvention.

Having thus described thenatureof my in-' vention and set forth a construction embody- 8o ing thesame, what I claim as new, and. desire to secure by Letters Patent of the United States, is. j v 1. Animproved incandescent lampconsisting of an exhausted bulb afilament, leadingin wires supporting said filament, a glass tube extending into the exhausted bulband sealed at the outer end to the neck of said bulb and at its inner end about the-wires which support the filament, and a reflector inserted into 93 the bulb before the neck is sealedan'd se-' two subscribing Witnesses, this 9th day of at its inner end about the wires which sup- July, A. D. 1901.

port the filament, and a reflector inserted into the bulb before the neck is sealed and secured t0 the inside of said bulb and length- EDGAR GARDNER 5 wise to it and opposite the filament. Witnesses:

In testimony whereof I have signed my E. L. HARLOW, name to this specification, in the presence of A. L. MESSER. 

